Park Tool BBT-49.3 bottom bracket tool
A precision CNC machined aluminum tool for installing and removing select 16-slot threaded bottom brackets including Shimano® XTR® BB93, Dura-Ace® BB9000 and Token® bottom brackets. Manufactured by Park Tool, anodized for easy identification and features a 3/8″ ratchet drive that is torque wrench compatible.
The BBT-49.3 features integrated threads for full compatibility with the Park Tool BBT-RS Bottom Bracket Tool Retaining System (sold separately). The BBT-RS uses an adjustable spring-based clamping system to apply consistent, adjustable pressure to the tool, ensuring full grip on the tool holder and preventing slippage.
highlights
- Fits 16 notch bottom bracket thread fittings with a major diameter (outside the notches) of 39-40mm and a minor diameter (inside the notches) of 37.6mm including:
- Shimano® XTR® BB93
- Shimano® Dura Ace® BB9000
- Tokens®
- Also fits lockrings on Shimano® STEPS square spindle e-bike systems, including:
- E6000
- E6002
- E6050
- Replacement for the Shimano TL-FC38 tool
- For 3/8″ ratchets






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